INDIANAPOLIS -- The parents of a missing Indiana University student have filed a civil negligence suit against three of their daughter's fellow students who were with her the night she vanished from the Bloomington campus two years ago.

Lauren Spierer's disappearance in June 2011 made national news. Since then, her parents, of Greenburgh, N.Y., have repeatedly said that the people who were with the fashion merchandise major that night have not been forthcoming about what they know.

The suit charges Corey Rossman, Jason Rosenbaum and Michael Beth with "negligence resulting in the disappearance, death or injury of an adult child." Rossman and Rosenbaum also are charged with "negligence per se" and "dram shop," a legal term used when damages are sought for providing alcohol to someone who is clearly intoxicated.

The lawsuit was filed "with great reluctance," according to a statement from Jason Barclay, the lawyer representing Rob and Charlene Spierer. They filed it only after Barclay and his legal team advised them they "would lose certain legal rights" if they didn't file anything within two years of Spierer's disappearance.

"We hope no one will misinterpret this action," Barclay said. "Any parent in search of information about a missing child would use every resource available to them."

Lauren Spierer, photographed in New York, disappeared from the Indiana University campus in 2011.(Photo: Courtesy of Spierer family)

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he complaint, filed with Monroe Circuit Court, presents a narrative about the night of June 2 and early morning of June 3, 2011, when Spierer was seen partying in Bloomington with her fellow students at their apartments and at a local sports bar.

She was noticeably intoxicated and was seen at several different spots. At 4:30 a.m., she was seen walking toward the corner of 11th Street and College Avenue. She was never seen again.

The lawsuit alleges that Rossman, Rosenbaum and Beth — who were with Spierer at various times that night — owed her "a duty of care." They were aware that she was "extremely intoxicated to the point of incapacitation," the suit says, and didn't do enough to make sure she made it home safely.

The suit says that Beth had noticed Spierer was intoxicated and tried to persuade her to sleep on his couch. And Rosenbaum, "expressing concern about Spierer's well-being and safety," tried to get some mutual friends to pick her up and take her home.

But when that didn't happen, the suit alleges, Rosenbaum acknowledged that he let her leave and saw her walk away. He was the last known person to see her alive.

Spierer's parents have made several public statements with strong words for Rossman, Beth and Rosenbaum. "We still believe that she may not have left Corey and Mike's or Jay's apartment," Rob Spierer recently told The (Westchester County, N.Y.) Journal-News.

The three men, meanwhile, have said little.

"I don't want my name in the news," Rossman told The Indianapolis Star for a story about the two-year anniversary of the disappearance. "I need to be as far away from this as possible. I'm trying to start my career."

Bloomington police never filed charges against any of the three. "There's only so many ways you can say we continue to investigate," police spokesman Capt. Joe Qualters recently told The Star.

The initial weeks and months after Spierer disappeared spawned an exhaustive effort to find her. Searchers looked in lakes and forests and abandoned buildings. Her story was featured on national news channels and "America's Most Wanted."

All along, Rob and Charlene Spierer have pleaded with those who were with her that night to come forward and tell them everything they know.

But it's clear they think those public pleas have not been enough — and their lawyer has made it clear they hope the lawsuit will help pry free some long-desired answers.

"We fully expect that those with relevant information," Barclay said, "will cooperate with this process."